document.writeln("<h1>Hello</h1>")
import name from './js/a.js'
import {add,mul} from './js/mathUtils.js'
require('./css/a.css')
require('./css/b.less')
document.getElementById("app").innerHTML=`
<h1>首页</h1>
<p>这是内容</p>
<button>这是按钮</button>
`
console.log(name)
console.log(add(10,20));
console.log(mul(20,30));